EP0097236B1 - Blowing device for removing banks in silos for bulk material - Google Patents

Blowing device for removing banks in silos for bulk material Download PDF

Info

Publication number
EP0097236B1
EP0097236B1 EP19830104416 EP83104416A EP0097236B1 EP 0097236 B1 EP0097236 B1 EP 0097236B1 EP 19830104416 EP19830104416 EP 19830104416 EP 83104416 A EP83104416 A EP 83104416A EP 0097236 B1 EP0097236 B1 EP 0097236B1
Authority
EP
European Patent Office
Prior art keywords
compressed air
valve
storage container
closed position
piston
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP19830104416
Other languages
German (de)
French (fr)
Other versions
EP0097236A1 (en
Inventor
Albert Dipl.-Ing. Rappen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vsr Engineering Fordertechnik GmbH
Original Assignee
Vsr Engineering Fordertechnik GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Vsr Engineering Fordertechnik GmbH filed Critical Vsr Engineering Fordertechnik GmbH
Publication of EP0097236A1 publication Critical patent/EP0097236A1/en
Application granted granted Critical
Publication of EP0097236B1 publication Critical patent/EP0097236B1/en
Expired legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D88/00—Large containers
    • B65D88/54—Large containers characterised by means facilitating filling or emptying
    • B65D88/64—Large containers characterised by means facilitating filling or emptying preventing bridge formation
    • B65D88/70—Large containers characterised by means facilitating filling or emptying preventing bridge formation using fluid jets
    • B65D88/703—Air blowing devices, i.e. devices for the sudden introduction of compressed air into the container

Definitions

  • the invention relates to a blowing device for removing accumulations in storage silos for bulk goods by air blows, with a compressed air storage container, with a compressed air discharge tube immersed in the compressed air storage container, with a compressed air inlet connection for the compressed air storage container, which can be connected to a compressed air network Quick exhaust valve and a multi-way valve upstream of the quick exhaust valve, a valve closing body which can be acted upon by compressed air being guided between the open position and the closed position in the compressed air storage container and is pressed in the closed position against the immersion end of the compressed air blow-out tube which is designed as a valve seat.
  • Such a blowing device is also known as an air cannon and allows a stored compressed air volume to flow through the compressed air blow-out pipe, which has a relatively large cross-section, in fractions of a second into the critical silo zones in which the bulk material has settled or has settled.
  • the sudden release of compressed air results in an air blast that overcomes the static friction of the fixed bulk material, so that the accumulated bulk material then flows off in the normal gravity flow with low sliding friction.
  • damming means bridge formation, funnel formation, chimney formation, caking or the like of bulk material.
  • a blowing device of the type described at the outset in which the valve closing piston guided between the mouth of the compressed air inlet connection in the compressed air storage container and the immersion end of the compressed air discharge tube is in the open position on the mouth of the compressed air inlet connection when the compressed air storage container is not loaded and only in the course of loading the compressed air storage container is pressed against the immersing end of the compressed air blow-out pipe in the closed position, so that the compressed air enters the compressed air storage container but cannot escape from the compressed air blow-out pipe.
  • the immersion end of the compressed air blow-out pipe is not closed. This results in a considerable risk of contamination. Because it is not excluded that foreign gases and / or bulk material get through the compressed air discharge pipe into the compressed air storage container (see. DE-A-2402001).
  • a blowing device is also known, the valve closing body of which is designed as a membrane.
  • the flexible membrane is acted upon by a stabilizing spring, because the stiffness of the flexible membrane is to be adjusted with the aid of the stabilizing spring acting on it.
  • the membrane will be deformed due to its flexibility, in particular in the course of a blowing process, because it is then to be feared that the membrane will then no longer assume a properly closed position.
  • the use of a membrane as a valve closing body is problematic anyway.
  • the membrane must be sufficiently perforated, namely be provided with openings for compressed air to fill the compressed air storage tank with compressed air can.
  • a perforation soon results in damage to the membrane, taking into account the opening and closing movements.
  • the membrane is also made of flexible material, preferably rubber, flutter phenomena between the closed position and the open position are not excluded, so there is no well-defined guidance of this known valve closing body (cf. EP-A1-0 021 999).
  • a device for loosening and conveying bulk material in bunkers which has a compressed air nozzle which is distributed over the circumference of the bunker outlet and arranged in the direction of the jet.
  • the nozzle orifices can be closed from the inside by spring-loaded valve pistons, but these valve pistons are opened by working pistons installed in the valve interior by means of compressed air supplied through the nozzles.
  • the valve piston and the working piston form a structural unit, whereby the working piston is strictly not loaded by a compression spring, but the working piston.
  • This combination of valve piston and working piston is designed as a differential piston, the differential piston being connected to the working piston via a piston rod.
  • a compressed air line opens orthogonally to the working direction of the differential piston. Since the effective area of the working piston is larger than the effective area of the valve piston, the working piston is pushed back while overcoming the pressure of the compression spring arranged between the rear side of the working piston and the piston housing. Only then is the valve piston moved to the open position.
  • opening of the nozzle or nozzles is to be effected by increasing the pressure in the feed line.
  • the valve piston can assume various open positions. In any case, a well-defined, unambiguous open position is not regularly given, at most when the working piston bears against its seal assigned to it on the rear.
  • the invention has for its object to provide a blowing device for removing build-up in storage silos for bulk goods of the type described in the opening paragraph, in which the valve closing piston is always in a faultless closed position and can be transferred to the open position by merely applying compressed air.
  • the invention achieves this object in a generic blowing device in that the valve closing piston is acted upon directly in the closed position by a compression spring arranged coaxially in the guide chamber between the chamber bottom and the valve (closing piston) and is held in the closed position even when the compressed air storage container is not loaded
  • the invention is based on the knowledge that the compressed air in the compressed air storage container for transferring the valve closing piston from the closing position into the open position itself can be used against the action of the compression spring and that the prevailing pressure is sufficient for this.
  • a blowing device for removing accumulations in storage silos for bulk material is realized by air blows, in which the valve-closing piston, which is pressed pneumatically into the closed position, is additionally loaded with a compression spring such that the valve-closing piston then also Assumes the closed position when the compressed air storage container is unloaded, i.e. there is no pneumatic effect on the valve closing piston.
  • the valve closing piston which is in the closed position even when the compressed air storage container is not loaded, prevents foreign gases and / or bulk material from the storage silo in question from reaching the compressed air discharge tube into the compressed air storage container or the valve system, so that there is no longer a risk of contamination . Consequently, the blowing device according to the invention is practically maintenance-free and is characterized by an improved and increased service life.
  • a blowing device for removing build-ups in storage silos 1 for bulk material 2 is shown by air blasts 3.
  • This blowing device has a compressed air storage container 4 with a compressed air discharge tube 5 immersed in the compressed air storage container.
  • the compressed air storage container is connected to a compressed air network 7 by means of a compressed air inlet connection 6.
  • a quick exhaust valve 8 is arranged in the compressed air inlet connection 6 and a multi-way valve 9, namely a 3/2-way valve, is arranged upstream of this.
  • a valve closing piston 10 that can be pressurized with air is guided between the open position and the closed position.
  • valve closing piston 10 In the closed position, the valve closing piston 10 is pressed against the immersion end 11 of the compressed air blow-out pipe 5, which is designed as a valve seat.
  • the valve closing piston 10 is acted upon by a compression spring 12 in the closed position and is thus held in the closed position even when the compressed air storage container 4 is not loaded.
  • the compression spring 12 - a coil spring according to the exemplary embodiment, but it can also be a plate spring or the like - is coaxial with the inlet opening of the compressed air inlet connector 6 and the compressed air blow-out pipe 5 in a guide chamber 13 for the valve closing piston 10 between the Chamber bottom and the valve closing piston 10 arranged.
  • the figures show immediately that the multi-way valve 9 is set to “on” for loading the compressed air storage container 4 and thereby the guide chamber 13 for the valve closing piston 10 is connected to the compressed air network 7 via the quick exhaust valve 8.
  • the compressed air storage container 4 is filled with compressed air until pressure equalization, so that the blowing device is then ready for operation.
  • the quick-release valve 8 is relieved of pressure by switching the multi-way valve 9 to “venting”, which now ventilates the guide chamber 13 for the valve closing piston 10.
  • valve closing piston 10 is pushed back against the action of the compression spring 12 in the open position, so that the compressed air can flow through the compressed air blow-out tube 5 into the open, expand there and bring about the desired loosening in the solid material 2 which has become stuck.
  • the valve closing piston 10 is pressed again into the closed position by the compression spring 12, so that no foreign gas and / or bulk material can flow into the compressed air storage container 4 and its valve system from the storage silo 1 in question.

Description

Die Erfindung betrifft eine Blasvorrichtung zum Beseitigen von Aufstauungen in Lagersilos für Schüttgut durch Luftstöße, mit einem Druckluft-Speicherbehälter, mit einem in den Druckluft-Speicherbehälter eintauchenden Druckluft-Ausblasrohr, mit einem an ein Druckluftnetz anschließbaren Druckluft-Eintrittsstutzen für den Druckluft-Speicherbehälter mit einem Schnellauslaßventil und einem dem Schnellauslaßventil vorgeordneten Mehrwegeventil, wobei in dem Druckluft-Speicherbehälter ein druckluftbeaufschlagbarer Ventilschließkörper zwischen Offenstellung und Schließstellung geführt ist und in Schließstellung gegen das als Ventilsitz ausgebildete Eintauchende des Druckluft-Ausblasrohres gedrückt ist. - Eine derartige Blasvorrichtung ist auch als Luftkanone bekannt und läßt ein gespeichertes Druckluftvolumen durch das einen verhältnismäßig großflächigen Rohrquerschnitt aufweisende Druckluft-Ausblasrohr in Bruchteilen von Sekunden in die kritischen Silozonen ausströmen, in denen sich das Schüttgut festsetzt bzw. festgesetzt hat. Aus der plötzlich freiwerdenden Druckluft resultiert ein Luftstoß, welcher die Haftreibung des festgesetzten Schüttgutes überwindet, so daß dann bei geringer Gleitreibung das aufgestaute Schüttgut im normalen Schwerkraftfluß abfließt. Aufstauungen meint im Rahmen der Erfindung Brückenbildung, Trichterbildung, Kaminbildung, Anbackungen od. dgl. von Schüttgut.The invention relates to a blowing device for removing accumulations in storage silos for bulk goods by air blows, with a compressed air storage container, with a compressed air discharge tube immersed in the compressed air storage container, with a compressed air inlet connection for the compressed air storage container, which can be connected to a compressed air network Quick exhaust valve and a multi-way valve upstream of the quick exhaust valve, a valve closing body which can be acted upon by compressed air being guided between the open position and the closed position in the compressed air storage container and is pressed in the closed position against the immersion end of the compressed air blow-out tube which is designed as a valve seat. - Such a blowing device is also known as an air cannon and allows a stored compressed air volume to flow through the compressed air blow-out pipe, which has a relatively large cross-section, in fractions of a second into the critical silo zones in which the bulk material has settled or has settled. The sudden release of compressed air results in an air blast that overcomes the static friction of the fixed bulk material, so that the accumulated bulk material then flows off in the normal gravity flow with low sliding friction. In the context of the invention, damming means bridge formation, funnel formation, chimney formation, caking or the like of bulk material.

Es ist eine Blasvorrichtung der eingangs beschriebenen Art bekannt, bei welcher der zwischen der Mündung des Druckluft-Eintrittsstutzens in dem Druckluft-Speicherbehälter und dem Eintauchende des Druckluft-Ausblasrohres geführte Ventilschließkolben sich bei unbeladenem Druckluft-Speicherbehälter in Offenstellung auf der Mündung des Druckluft-Eintrittsstutzens befindet und erst im Zuge des Beladens des Druckluft-Speicherbehälters gegen das Eintauchende des Druckluft-Ausblasrohres in Schlie- βstellung gedrückt wird, so daß die Druckluft zwar in den Druckluft-Speicherbehälter eintreten, nicht dagegen aus dem Druckluft-Ausblasrohr austreten kann. In Offenstellung ist also das Eintauchende des Druckluft-Ausblasrohres unverschlossen. Daraus resultiert eine erhebliche Verschmutzungsgefahr. Denn es ist nicht ausgeschlossen, daß Fremdgase und/oder Schüttgut durch das Druckluft-Ausblasrohr in den Druckiuft-Speicherbehäiter gelangen (vgl. DE-A-2402001).A blowing device of the type described at the outset is known, in which the valve closing piston guided between the mouth of the compressed air inlet connection in the compressed air storage container and the immersion end of the compressed air discharge tube is in the open position on the mouth of the compressed air inlet connection when the compressed air storage container is not loaded and only in the course of loading the compressed air storage container is pressed against the immersing end of the compressed air blow-out pipe in the closed position, so that the compressed air enters the compressed air storage container but cannot escape from the compressed air blow-out pipe. In the open position, the immersion end of the compressed air blow-out pipe is not closed. This results in a considerable risk of contamination. Because it is not excluded that foreign gases and / or bulk material get through the compressed air discharge pipe into the compressed air storage container (see. DE-A-2402001).

Ferner kennt man eine Blasvorrichtung, deren Ventilschließkörper als Membrane ausgebildet ist. Bei dieser bekannten Ausführungsform ist die flexible Membrane von einer Stabilisierungsfeder beaufschlagt, weil die Steifigkeit der flexiblen Membrane mit Hilfe der sie beaufschlagenden Stabilisierungsfeder eingestellt werden soll. Tatsächlich besteht die Gefahr, daß die Membrane aufgrund ihrer Flexibilität deformiert wird, insbesondere im Zuge eines Blasvorganges, weil dann zu befürchten ist, daß die Membrane anschließend keine einwandfreie Schließstellung mehr einnimmt. Darüber hinaus ist der Einsatz einer Membrane als Ventilschließkörper ohnehin problematisch. Denn einerseits fehlt eine wohldefinierte Führung zwischen Schließstellung und Offenstellung - im übrigen auch für die zum Einstellen der Stabilität der Membrane dienende Stabilisierungsfeder - andererseits muß die Membrane hinreichend perforiert sein, nämlich mit Durchtrittsöffnungen für Druckluft versehen sein, um den Druckluft-Speicherbehälter mit Druckluft füllen zu können. Aus einer derartigen Perforation resultiert jedoch alsbald eine Beschädigung der Membrane unter Berücksichtigung der Öffnungs- und Schließbewegungen. Da die Membrane darüber hinaus aus flexiblem Material, bevorzugt Gummi, besteht, sind Flattererscheinungen zwischen Schließstellung und Offenstellung nicht ausgeschlossen, fehlt also eine wohldefinierte Führung dieses bekannten Ventilschließkörpers (vgl. EP-A1-0 021 999).A blowing device is also known, the valve closing body of which is designed as a membrane. In this known embodiment, the flexible membrane is acted upon by a stabilizing spring, because the stiffness of the flexible membrane is to be adjusted with the aid of the stabilizing spring acting on it. In fact, there is a risk that the membrane will be deformed due to its flexibility, in particular in the course of a blowing process, because it is then to be feared that the membrane will then no longer assume a properly closed position. In addition, the use of a membrane as a valve closing body is problematic anyway. Because on the one hand there is no well-defined guidance between the closed position and the open position - moreover for the stabilizing spring used to adjust the stability of the membrane - on the other hand the membrane must be sufficiently perforated, namely be provided with openings for compressed air to fill the compressed air storage tank with compressed air can. However, such a perforation soon results in damage to the membrane, taking into account the opening and closing movements. Since the membrane is also made of flexible material, preferably rubber, flutter phenomena between the closed position and the open position are not excluded, so there is no well-defined guidance of this known valve closing body (cf. EP-A1-0 021 999).

Außerdem ist eine Vorrichtung zum Auflockern und Fördern von Schüttgut in Bunkern bekannt, welche auf dem Umfang des Bunkerauslaufes verteilte, mit Strahlrichtung nach innen angeordnete Druckluftdüse aufweist. Die Düsenmündungen sind durch federbelastete Ventilkolben von innen verschließbar, wobei jedoch diese Ventilkolben durch im Ventilinneren eingebaute Arbeitskolben mittels den Düsen zugeführter Druckluft geöffnet werden. Im Einzelfall bilden der Ventilkolben und der Arbeitskolben eine Baueinheit, wobei in Strenge nicht der Ventilkolben, sondern der Arbeitskolben von einer Druckfeder belastet ist. Diese Kombination aus Ventilkolben und Arbeitskolben ist als Differentialkolben ausgebildet, wobei der Differentialkolben mit dem Arbeitskolben über eine Kolbenstange in Verbindung steht. Im Bereich der Kolbenstange mündet eine orthogonal zur Arbeitsrichtung des Differentialkolbens angeordnete Druckluftleitung. Da die wirksame Fläche des Arbeitskolbens größer als die wirksame Fläche des Ventilkolbens ist, wird der Arbeitskolben unter Überwindung des Druckes der zwischen der Rückseite des Arbeitskolbens und dem Kolbengehäuse angeordneten Druckfeder zurückgedrückt. Erst dadurch wird der Ventilkolben in Offenstellung überführt. Bei dieser bekannten Anordnung soll durch Steigerung des Druckes in der Zuleitung ein verschieden weites Öffnen der Düse bzw. Düsen bewirkt werden. Folglich kann der Ventilkolben verschiedene Offenstellungen einnehmen. Jedenfalls ist eine wohldefinierte eindeutige Offenstellung regelmäßig nicht gegeben, allenfalls dann, wenn der Arbeitskolben gegen seine ihm rückseitig zugeordnete Dichtung anliegt. Daher werden bei dieser bekannten Vorrichtung keine eindeutigen Verhältnisse im Zuge der Druckluftbeaufschlagung und folglich bei der Beseitigung von Aufstauungen in dem betreffenden Lagersilo erreicht. Vielmehr sind Flattererscheinungen des Arbeitskolbens und damit auch des Ventilkolbens zu befürchten, so daß die Effektivität der Druckluftbeaufschlagung verlorengeht (vgl. DE-C-726 658).In addition, a device for loosening and conveying bulk material in bunkers is known which has a compressed air nozzle which is distributed over the circumference of the bunker outlet and arranged in the direction of the jet. The nozzle orifices can be closed from the inside by spring-loaded valve pistons, but these valve pistons are opened by working pistons installed in the valve interior by means of compressed air supplied through the nozzles. In individual cases, the valve piston and the working piston form a structural unit, whereby the working piston is strictly not loaded by a compression spring, but the working piston. This combination of valve piston and working piston is designed as a differential piston, the differential piston being connected to the working piston via a piston rod. In the area of the piston rod, a compressed air line opens orthogonally to the working direction of the differential piston. Since the effective area of the working piston is larger than the effective area of the valve piston, the working piston is pushed back while overcoming the pressure of the compression spring arranged between the rear side of the working piston and the piston housing. Only then is the valve piston moved to the open position. In this known arrangement, opening of the nozzle or nozzles is to be effected by increasing the pressure in the feed line. As a result, the valve piston can assume various open positions. In any case, a well-defined, unambiguous open position is not regularly given, at most when the working piston bears against its seal assigned to it on the rear. Therefore, in this known device there are no clear conditions in the course of the pressurized air and consequently in the Removal of congestion in the relevant storage silo achieved. Rather flutter phenomena of the working piston and thus also of the valve piston are to be feared, so that the effectiveness of the compressed air supply is lost (cf. DE-C-726 658).

Der Erfindung liegt die Aufgabe zugrunde, eine Blasvorrichtung zum Beseitigen von Aufstauungen in Lagersilos für Schüttgut der eingangs beschriebenen Art zu schaffen, bei welcher sich der Ventilschließkolben stets in einwandfreier Schließstellung befindet und durch bloße Druckluftbeaufschlagung in Offenstellung überführt werden kann.The invention has for its object to provide a blowing device for removing build-up in storage silos for bulk goods of the type described in the opening paragraph, in which the valve closing piston is always in a faultless closed position and can be transferred to the open position by merely applying compressed air.

Diese Aufgabe löst die Erfindung bei einer gattungsgemäßen Blasvorrichtung dadurch, daß der Ventilschließkolben in Schließstellung unmittelbar von einer in der Führungskammer zwischen dem Kammerboden und dem Venti(schließ- kolben koaxial angeordneten Druckfeder beaufschlagt und auch bei unbeladenem Druckluft-Speicherbehälter in Schließstellung gehalten ist. - Die Erfindung geht von der Erkenntnis aus, daß die Druckluft in dem Druckluft-Speicherbehälter für die Überführung des Ventilschließkolbens von Schließstelluhg in Offenstellung selbst entgegen der Wirkung der Druckfeder herangezogen werden kann und dazu der herrschende Druck ausreicht. Ein Einströmen von Fremdgasen bzw. Einfließen von Schüttgut aus dem betreffenden Lagersilo in die erfindungsgemäße Blasvorrichtung wird selbst dann verhindert, wenn der Druckluft-Speicherbehälter nicht mit Druckluft beladen ist. Denn nunmehr wird der von der Druckfeder in Schließstellung gedrückte Ventilschließkolben nur noch dann - nämlich infolge Druckluftbeaufschlagung - zur Freigabe des Eintauchendes des Druckluft-Ausblasrohres in Offenstellung gedrückt, wenn die Druckluft durch das Druckluft-Ausblasrohr ins Freie strömt und folglich die Druckluft im Schüttgut expandiert, um die gewünschte Lockerung und damit das Fließen des Schüttgutes herbeizuführen. Anschließend drückt die Druckfeder den Ventilschließkolben in Schließstellung zurück, also auf das den Ventilsitz bildende Eintauchende des Druckluft-Ausbiasrohres, gleichgültig, ob der Druckluft-Speicherbehälter erneut mit Druckluft gefüllt wird oder in unbeladenem Zustand verbleibt.The invention achieves this object in a generic blowing device in that the valve closing piston is acted upon directly in the closed position by a compression spring arranged coaxially in the guide chamber between the chamber bottom and the valve (closing piston) and is held in the closed position even when the compressed air storage container is not loaded The invention is based on the knowledge that the compressed air in the compressed air storage container for transferring the valve closing piston from the closing position into the open position itself can be used against the action of the compression spring and that the prevailing pressure is sufficient for this. An inflow of foreign gases or inflow of bulk material are sufficient the storage silo in question in the blowing device according to the invention is prevented even if the compressed air storage container is not loaded with compressed air, because the valve closing piston which is pressed by the compression spring in the closed position is only then - namely as a result Compressed air supply - pressed to release the immersion end of the compressed air blow-out pipe in the open position when the compressed air flows through the compressed air blow-out pipe into the open and consequently the compressed air in the bulk material expands to bring about the desired loosening and thus the flow of the bulk material. The compression spring then pushes the valve closing piston back into the closed position, i.e. on the immersion end of the compressed air blow-off tube that forms the valve seat, regardless of whether the compressed air storage container is filled with compressed air again or remains in an unloaded state.

Die durch die Erfindung erreichten Vorteile sind im wesentlichen darin zu sehen, daß eine Blasvorrichtung zum Beseitigen von Aufstauungen in Lagersilos für Schüttgut durch Luftstöße verwirklicht wird, bei welcher der pneumatisch in Schließstellung gedrückte Ventilschließkolben zusätzlich mit einer Druckfeder derart belastet ist, daß der Ventilschließkolben auch dann Schließstellung einnimmt, wenn der Druckluft-Speicherbehälter unbeladen ist, also eine pneumatische Wirkung auf den Ventilschließkolben gar nicht ausgeübt wird. Auf diese Weise verhindert der sich auch bei unbeladenem Druckluft-Speicherbehälter in Schließstellung befindliche Ventilschließkolben, daß Fremdgase und/oder Schüttgut aus dem betreffenden Lagersilo durch das Druckluft-Ausblasrohr in den Druckluft-Speicherbehälter bzw. das Ventilsystem gelangen kann, so daß nicht länger Verschmutzungsgefahr besteht. Folglich ist die erfindungsgemäße Blasvorrichtung praktisch wartungsfrei und zeichnet sich durch verbesserte sowie erhöhte Lebensdauer aus.The advantages achieved by the invention are essentially to be seen in the fact that a blowing device for removing accumulations in storage silos for bulk material is realized by air blows, in which the valve-closing piston, which is pressed pneumatically into the closed position, is additionally loaded with a compression spring such that the valve-closing piston then also Assumes the closed position when the compressed air storage container is unloaded, i.e. there is no pneumatic effect on the valve closing piston. In this way, the valve closing piston, which is in the closed position even when the compressed air storage container is not loaded, prevents foreign gases and / or bulk material from the storage silo in question from reaching the compressed air discharge tube into the compressed air storage container or the valve system, so that there is no longer a risk of contamination . Consequently, the blowing device according to the invention is practically maintenance-free and is characterized by an improved and increased service life.

Im folgenden wird die Erfindung anhand einer lediglich ein Ausführungsbeispiel darstellenden Zeichnung näher erläutert ; es zeigen :

  • Figur 1 in schematischer Darstellung eine erfindungsgemäße Blasvorrichtung zu Beginn einer Druckluftbeladung,
  • Figur 2 den Gegenstand nach Fig. 1 nach erfolgter Druckluftbeladung, und
  • Figur 3 den Gegenstand nach Fig. 1 im Zuge der Druckluftentladung.
In the following the invention is explained in more detail with reference to a drawing showing only one embodiment; show it :
  • 1 shows a schematic representation of a blowing device according to the invention at the beginning of a compressed air loading,
  • Figure 2 shows the object of FIG. 1 after compressed air loading, and
  • 3 shows the object of FIG. 1 in the course of the compressed air discharge.

In den Figuren ist eine Blasvorrichtung zum Beseitigen von Aufstauungen in Lagersilos 1 für Schüttgut 2 durch Luftstöße 3 dargestellt. Diese Blasvorrichtung weist einen Druckluft-Speicherbehälter 4 mit einem in den Druckluft-Speicherbehälter eintauchenden Druckluft-Ausblasrohr 5 auf. Außerdem ist der Druckluft-Speicherbehälter mittels eines Druckluft-Eintrittsstutzens 6 an ein Druckluftnetz 7 angeschlossen. In dem Druckluft-Eintrittsstutzen 6 ist ein Schnellauslaßventil 8 angeordnet und diesem ein Mehrwegeventil 9, nämlich 3/2-Wegeventil, vorgeordnet. In dem Druckluft-Speicherbehälter ist ein druckluftbeaufschlagbarer Ventilschließkolben 10 zwischen Offenstellung und Schließstellung geführt. In Schließstellung ist der Ventilschließkolben 10 gegen das als Ventilsitz ausgebildete Eintauchende 11 des Druckluft-Ausblasrohres 5 gedrückt. Der Ventilschließkolben 10 ist in Schließstellung von einer Druckfeder 12 beaufschlagt und dadurch auch bei unbeladenem Druckluft-Speicherbehälter 4 in Schließstellung gehalten. Die Druckfeder 12 - nach dem Ausführungsbeispiel eine Schraubenfeder, es kann sich aber auch um eine Tellerfeder od. dgl. handeln - ist koaxial zu der Eintrittsöffnung des Druckluft-Eintrittsstutzens 6 und dem Druckluft-Ausblasrohr 5 in einer Führungskammer 13 für den Ventilschließkolben 10 zwischen dem Kammerboden und dem Ventilschließkolben 10 angeordnet.In the figures, a blowing device for removing build-ups in storage silos 1 for bulk material 2 is shown by air blasts 3. This blowing device has a compressed air storage container 4 with a compressed air discharge tube 5 immersed in the compressed air storage container. In addition, the compressed air storage container is connected to a compressed air network 7 by means of a compressed air inlet connection 6. A quick exhaust valve 8 is arranged in the compressed air inlet connection 6 and a multi-way valve 9, namely a 3/2-way valve, is arranged upstream of this. In the compressed air storage container, a valve closing piston 10 that can be pressurized with air is guided between the open position and the closed position. In the closed position, the valve closing piston 10 is pressed against the immersion end 11 of the compressed air blow-out pipe 5, which is designed as a valve seat. The valve closing piston 10 is acted upon by a compression spring 12 in the closed position and is thus held in the closed position even when the compressed air storage container 4 is not loaded. The compression spring 12 - a coil spring according to the exemplary embodiment, but it can also be a plate spring or the like - is coaxial with the inlet opening of the compressed air inlet connector 6 and the compressed air blow-out pipe 5 in a guide chamber 13 for the valve closing piston 10 between the Chamber bottom and the valve closing piston 10 arranged.

Die Figuren lassen unmittelbar erkennen, daß zur Beladung des Druckluft-Speicherbehälters 4 das Mehrwegeventil 9 auf « Ein » gestellt und dadurch die Führungskammer 13 für den Ventilschließkolben 10 mit dem Druckluftnetz 7 über das Schnellauslaßventil 8 verbunden wird. Durch Überströmöffnungen 14 in der Führungskammer 13 für den Ventilschließkolben 10 wird der Druckluft-Speicherbehälter 4 bis zum Druckausgleich mit Druckluft gefüllt, so daß dann die Blasvorrichtung betriebsbereit ist. Im Zuge der Entladung wird durch das Umstellen des Mehrwegeventils 9 auf « Entlüften » das Schnellauslaßventil 8 druckentlastet, welches nunmehr die Führungskammer 13 für den Ventilschließkolben 10 entlüftet. Infolge des in dem Druckluft-Speicherbehälter herrschenden Uberdruckes wird der Ventilschließkolben 10 gegen die Wirkung der Druckfeder 12 in Offenstellung zurückgedrückt, so daß die Druckluft durch das Druckluft-Ausblasrohr 5 ins Freie strömen, dort expandieren und im festgebackenen Schüttgut 2 die gewünschte Lockerung herbeiführen kann. Nach dieser Entladung wird der Ventilschließkolben 10 durch die Druckfeder 12 erneut in Schließstellung gedrückt, so daß aus dem betreffenden Lagersilo 1 kein Fremdgas und/oder Schüttgut in den Druckluft-Speicherbehälter 4 und dessen Ventilsystem einfließen kann.The figures show immediately that the multi-way valve 9 is set to “on” for loading the compressed air storage container 4 and thereby the guide chamber 13 for the valve closing piston 10 is connected to the compressed air network 7 via the quick exhaust valve 8. Through overflow openings 14 in the guide chamber 13 for the valve closing piston 10, the compressed air storage container 4 is filled with compressed air until pressure equalization, so that the blowing device is then ready for operation. In the course of the discharge, the quick-release valve 8 is relieved of pressure by switching the multi-way valve 9 to “venting”, which now ventilates the guide chamber 13 for the valve closing piston 10. As a result of that in the compressed air storage area the prevailing overpressure, the valve closing piston 10 is pushed back against the action of the compression spring 12 in the open position, so that the compressed air can flow through the compressed air blow-out tube 5 into the open, expand there and bring about the desired loosening in the solid material 2 which has become stuck. After this discharge, the valve closing piston 10 is pressed again into the closed position by the compression spring 12, so that no foreign gas and / or bulk material can flow into the compressed air storage container 4 and its valve system from the storage silo 1 in question.

Claims (1)

  1. A pneumatic appliance for the elimination by air-surges (3) of blockages in storage silos (1) for loose materials (2) with a compressed air storage container (4) with a compressed air blow-out pipe (5) projecting into the compressed air storage container (4), with a compressed air feed pipe (6), connectable to a compressed air supply (7) for the compressed air storage container (4), with a rapid release valve (8) and a multi-way valve (9) preceding the rapid release valve (8), in which a valve-closing piston (10) that can be directly acted upon by compressed air is moved between its open position and its closed position in a guide chamber (13) within the compressed air storage container (4) located coaxially with the entry aperture of the compressed air entry feed pipe (6), and the compressed air blow-out pipe (5), and in its closed position is pressed against the projecting end (11) of the compressed air blow-out pipe (5) which is formed as a valve seating, characterized in that the valve-closing piston (10) in its closed position is directly acted upon by a compression spring (12) coaxially located in the guide chamber (13) between a base of the chamber and the valve-closing piston (10) and is still held in the closed position if there is no pressure in the compressed air storage container (4).
EP19830104416 1982-06-23 1983-05-05 Blowing device for removing banks in silos for bulk material Expired EP0097236B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3223406 1982-06-23
DE19823223406 DE3223406C2 (en) 1982-06-23 1982-06-23 Blowing device for removing blockages in storage silos for bulk goods by means of blasts of air

Publications (2)

Publication Number Publication Date
EP0097236A1 EP0097236A1 (en) 1984-01-04
EP0097236B1 true EP0097236B1 (en) 1986-07-09

Family

ID=6166637

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19830104416 Expired EP0097236B1 (en) 1982-06-23 1983-05-05 Blowing device for removing banks in silos for bulk material

Country Status (2)

Country Link
EP (1) EP0097236B1 (en)
DE (1) DE3223406C2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104670748A (en) * 2015-02-28 2015-06-03 深圳市中意能源设备有限公司 Blower and blowing blockage remover

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3602207A1 (en) * 1986-01-25 1987-07-30 Vsr Eng Foerdertechnik BLOWING DEVICE FOR ELIMINATING CONSTRUCTIONS IN STORAGE SILOS FOR DUMPY GOODS BY AIR BLOWERS
US4676402A (en) * 1986-04-04 1987-06-30 Martin Engineering Company Quick release aerator
EP0248265A3 (en) * 1986-05-20 1988-08-03 AGRICHEMA Materialflusstechnik GmbH Quick release aerator for preventing bridge formations in bulk containers
DE3616990C1 (en) * 1986-05-21 1987-12-17 Agrichema Materialflusstechnik Air blast device for resolving material build-up in storage silos for bulk material
FR2603968B1 (en) * 1986-09-17 1989-02-24 Air Ind Environnement CONTROL DEVICE FOR PNEUMATIC CLEANING OF FILTERS
DE3742489C2 (en) * 1987-12-15 1998-04-09 Agrichema Materialflusstechnik Air blast device
DE19720143C2 (en) * 1997-05-14 2000-04-20 Pka Umwelttech Gmbh & Co Kg silo
ITBG20010037A1 (en) * 2001-10-19 2003-04-19 Larix Srl BIG VALVE OR INSTANTANEOUS DISCHARGE OF LARGE CAPACITY OF AIRPLANES, FOR FLUIDIFICATION OF GRANULAR AND / OR DUSTY MATERIALS.
DE20316754U1 (en) * 2003-10-31 2003-12-24 Agrilux Beteiligungs Gmbh Air blast device with internal valve unit located at the top
US7837062B2 (en) 2006-03-10 2010-11-23 Martin Engineering Company Air cannon for removal of flowable material from a material handling system
US20070209648A1 (en) * 2006-03-10 2007-09-13 Martin Engineering Company Air cannon for removal of flowable material from a material handling system
DE202009009307U1 (en) * 2009-07-07 2009-09-10 Agrilux Beteiligungs Gmbh Apparatus for the burst-like blowing out of gaseous media
CN109969629A (en) * 2019-04-30 2019-07-05 北京长峰金鼎科技有限公司 A kind of feed bin of band stirring blanking
CN113479498B (en) * 2021-07-09 2023-05-30 广东韶钢松山股份有限公司 Long-life double-stroke air cannon device and use method

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE726658C (en) * 1937-11-10 1942-10-17 Johannes Moeller Device for loosening and conveying bulk goods in bunkers
US3788527A (en) * 1973-01-22 1974-01-29 Martin Eng Co Quick-release aerator for introducing high pressure air into a container to facilitate dispensing
GB1584802A (en) * 1976-08-18 1981-02-18 Os Bad Rozwojowy Syst Mech Apparatus for use in cleaning storage bins
FR2459188A1 (en) * 1979-06-19 1981-01-09 Ermap APPARATUS FOR AEROSPACE BY COMPRESSED AIR INJECTION

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104670748A (en) * 2015-02-28 2015-06-03 深圳市中意能源设备有限公司 Blower and blowing blockage remover

Also Published As

Publication number Publication date
DE3223406A1 (en) 1983-12-29
DE3223406C2 (en) 1985-10-31
EP0097236A1 (en) 1984-01-04

Similar Documents

Publication Publication Date Title
EP0097236B1 (en) Blowing device for removing banks in silos for bulk material
DE3602207C2 (en)
DE2121389C3 (en) Quick-opening shut-off valve for pressurized fluids
EP0176627B1 (en) Method and device for pneumatically or hydraulically transporting solid-state materials through pipes
DE2724318C2 (en) Process for moistening the abrasive when blasting with compressed air
DE102010010075B3 (en) Apparatus and method for transferring rod-shaped articles of the tobacco processing industry from a magazine into a delivery line
EP1649918B1 (en) Cleaning device for dust-removing filters
DE102005016228B4 (en) Pipe cleaner
DE2122052A1 (en)
DE4302951C1 (en) Ejector pump diffuser obturator - has compressed-gas passage to diffuser shut by plug when in rest position
WO1999000321A1 (en) Container for fluids
DE2628236C3 (en) Method and device for venting a pressure vessel conveyor
DE3616990C1 (en) Air blast device for resolving material build-up in storage silos for bulk material
DE102006057898B4 (en) Device for conveying fluidisable media
DE3245374C1 (en) Method and device for reducing the pressure of top gases of an upper pressure level
DE19743789B4 (en) Apparatus for the abrupt blowing out of compressed air for removing material caking of bulk materials in reaction vessels
EP0324368B1 (en) Quick release aerator for removing bulk material bridge formations in silos and the like
CH690573A5 (en) Method and apparatus for avoiding Produktestaub- or gas outlet products at filling with solid or Flüssigkeitsdosiersystemen.
CH692143A5 (en) Method for avoiding dust and gas emissions when decanting fluids and solids
DE2838341A1 (en) Fire extinguishing agent container - has rubber vessel fitted inside metal vessel both optionally usable for agent or gas
DE102010054698A1 (en) Device for discharging bulk material
EP1918221A1 (en) System of air blaster devices
DE3140043A1 (en) Fire protection flap
DE3742489A1 (en) Puffing device
DE1269097B (en) Device for pneumatic mixing and conveying of goods that tend to harden from a standing pressure vessel

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): FR GB IT SE

17P Request for examination filed

Effective date: 19840128

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): FR GB IT SE

ITF It: translation for a ep patent filed

Owner name: ING. A. GIAMBROCONO & C. S.R.L.

ET Fr: translation filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19870506

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19881122

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19940503

Year of fee payment: 12

EUG Se: european patent has lapsed

Ref document number: 83104416.9

Effective date: 19880616

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19960229

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST